Its bishop, Quintianus, was present at the Synod of Elvira early in the fourth century. There exists no complete list of his successors for the next two centuries, though some are known from ancient diptychs. In 584 the Visigothic king, Liuvigild, incorporated with his state the Kingdom of the Suebi, to which Évora had hitherto belonged. From the sixth and seventh centuries there remain a few Christian inscriptions pertaining to Évora. In one of them has been interpolated the name of a Bishop Julian (1 December, 566); he is, however, inadmissible. Thenceforth the episcopal list is known from the reign of Reccared (586) to the Islamic invasion (714), after which the succession is quite unknown for four centuries and a half, with the exception of the epitaph of a Bishop Daniel (January, 1100).
Until the reconquest (1166) by Afonso I of Portugal, Évora was suffragan to the archdiocese of Mérida. Under this king it became suffragan to the archdiocese of Braga, despite the protests of the Archbishops of Compostella, administrators of Mérida. In 1274, however, the latter succeeded in bringing Évora within their jurisdiction. Finally, it became suffragan to the archdiocese of Lisbon from 1394 to 1544, when it was made an archbishopric.
Portuguese writers have maintained that the first bishop of Évora was St. Mantius, a Roman, and a disciple of Jesus Christ, sent by the Apostles into the Iberian Peninsula as a missionary of the Gospel.
